NetworkPkg: Add YAML file for CI builds

NetworkPkg: Add YAML file for CI builds

https://bugzilla.tianocore.org/show_bug.cgi?id=2315

Add YAML file to the package directory with the
configuration of the checks to perform during a
CI build.

Use BaseCryptLibNull and TlsLibNull for package CI
builds to reduce package build times.  Enabled with
CONTINUOUS_INTEGRATION in YAML files.  By default
CONTINUOUS_INTEGRATION is not defined, and the
original lib mappings are preserved.

Cc: Jiaxin Wu <jiaxin.wu@intel.com>
Cc: Siyuan Fu <siyuan.fu@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>